/Engine/Plugins/Experimental/PhysicsControl/Source/PhysicsControl/Public/PhysicsControlComponent.h
Specifies the type of control that is created when making controls from a skeleton or a set of limbs. Note that if controls are made individually then other options are available - i.e. in a character, any body part can be controlled relative to any other part, or indeed any other object.
enum EPhysicsControlType { WorldSpace, ParentSpace, }